An Introduction to Hidden Creatures in Lakes and Bays around the World.
You can see my own "original version" sent to me 40 years ago at http://www.lochnessinvestigation.com/flipper.htmlRegards, DR
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And I had heard that it had been retouched with an aerograph by the Nature magazine.Thanks for the link.
Claudio, I will be happy to share information if you can establish email communication, via my website or cryptozoology.com.